for the decline in US crude inventories more than expected.
Brent crude increased earlier on Thursday above $ 50 a barrel for the first time this week.
Japan's exports fell for the second consecutive month in August, in a sign of the slowdown of the Chinese economy that may have a negative impact on third-largest economy in the world. This data comes after the release of disturbing other data from other Asian economies, including South Korea and Taiwan, increasing concerns about the implications of a sharp slowdown in China.
The global Brent crude 25 cents went down to $ 49.50 a barrel by 0830 GMT, after rising to $ 50.14 a barrel earlier.
The US light crude fell 30 cents to $ 46.85 a barrel